Coast at 40-50mph for a sec so that the Eco light comes on. Step hard on the gas as if you were going to pass a car in front of you. The engine hesitates and then bounces up and down as if you were going over a rumble strip for a second. Then it finally finds where it needs to be and starts pulling.

Mds engages and disengages about a hundred times on a long trip so it's not that at all. This is a distinct error. The mds can barely be felt if at all I'd you are consentrating hard at feeling for it.